低空管廊线状要素增量更新制图研究

Low altitude corridor linear features incremental updating model in map cartography

在空间数据制图表达理论的基础上,提出了一种基于空间要素变化增量的地图更新方法。该方法运用空间信息变化模型,对不同增量类型进行了归纳和处理,并以XML语言模型为基础设计了增量信息的描述规范,对增量要素符号的输出控制和关系处理方法进行了设计。最后以线状要素为例,对该方法进行了实验。实验表明,该方法能针对地图上有变化的要素进行局部更新,降低地图更新的成本和提高地图更新的效率,有助于推进平时应急救援、战时防护抢险的能力发展。

On the basis of the theory in spatial data mapping and expression,a new method of map updating is proposed.A spatial information change model is built in this method to induce and process different incremental types.The output control and relational processing method of the incremental element symbols in XML language is designed.Moreover,linear map features incremental updating experiment shows that only the changed elements in map are updated instead of the hole features.It not only reduces the cost but also improves the efficiency on map updating,helps to develop the ability of emergency rescue and wartime protection.